Methyl chloroformate → (3,5-Bis-trifluoromethyl-benzyl)-[2-(cyclohexyl-methoxy-methyl)-5-trifluoromethyl-benzyl]-carbamic acid methyl ester

Beteiligte Stoffe

Reaktionsschritte

To a solution of (3,5-bis-trifluoromethyl-benzyl)-[2-(cyclohexyl-methoxy-methyl)-5-trifluoromethyl-benzyl]-amine (Example 41, STEP E, 22 mg, 0.042 mmol) in dichloromethane (1 ml) was added diisopropylethyl amine (8.09 mg, 0.063 mmol) followed by methyl chloroformate (3.94 mg, 0.042 mmol) at room temperature and stirred for overnight. Reaction mixture was then concentrated in vacuo and the product was purified on Biotage column (12+S), eluting with 2% ethyl acetate in heptane (1 CV), 2-20% (10CV), 20% (2CV) to yield the title compound (7 mg, 30%) as colorless oil. 1H NMR (400 MHz, CDCl3) δ ppm 1.0 (m, 6H) 1.4(m, 1H) 1.5(m, 2H) 1.7(s, 1H) 1.9 (d, J=11.2 Hz, 1H) 3.0 (s, 3H) 3.8(s, 3H) 4.0 (d, J=17.9 Hz, 1H) 4.6 (m, 4H) 7.25 (d, J=10.4 Hz, 1H) 7.45 (d, J=7.5 Hz, 1H) 7.53 (m, 3H) 7.7 (s, 1H) 7.8 (s, 1H). MS (ES+) Calc: 585.2, Found: 630.3 (M+45).

Herkunft & Nachweise